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https://issues.apache.org/jira/browse/NIFI-53?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15317790#comment-15317790
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Joseph Witt commented on NIFI-53:
---------------------------------

It is quite reasonable that when pulling data from a queue that this queue 
could be empty when doing so.  That is all this means.  And since we allow 
processors to pull zero or more things in a given pass then another thread 
could be given a thread and by then there could be no data left.  Not at all an 
issue in my view.

> Framework should not trigger components to run if input queue has only 
> penalized FlowFiles
> ------------------------------------------------------------------------------------------
>
>                 Key: NIFI-53
>                 URL: https://issues.apache.org/jira/browse/NIFI-53
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework
>            Reporter: Joseph Witt
>            Assignee: Oleg Zhurakousky
>
> Framework should avoid calling on trigger in the event all items in the input 
> queue are penalized (this is for those cases when checking 'do you have data 
> to process')



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